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# In North America, of the people who buy cell phones,

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Manager
Joined: 10 Apr 2018
Posts: 182

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11 Oct 2018, 20:52
2
00:00

Difficulty:

55% (hard)

Question Stats:

59% (01:37) correct 41% (01:38) wrong based on 87 sessions

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In North America, of the people who buy cell phones, the percentage of people who bought phones from local manufacturers has decreased by five percent in the past one year. Since many local phone manufacturers in North America depend heavily on the local population for their customer base, this reduction is likely to have caused a noticeable negative economic effect on these manufacturers.

Which of the following, if true, most seriously weakens the argument?

(A)In the past year, the total number of people buying new cell phones has increased considerably in North America.

(B)Some people from Asia also buy cell phones from manufacturers in North America.

(C)The cost price of cell phones has increased considerably, and so the selling price has also increased correspondingly.

(D)Many new cell phone manufacturers have entered the market in North America.

(E) Those who do not purchase from local manufacturers do not pay a high price for phones.
Manager
Joined: 21 May 2017
Posts: 67
Location: India
Re: In North America, of the people who buy cell phones,  [#permalink]

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11 Oct 2018, 23:20
In choice A it is given that " total number of people buying cell phones increased in NA. " But its no where written that the total number of people buying phones from local manufacturers increased , may be they started buying phones online.. Can some one suggest where am I going wrong in this question.
I marked choice B assuming that their overall sale increased as people of Asia also started buying from them . Does it not sound what is expected from the question here??
Math Expert
Joined: 02 Aug 2009
Posts: 7334
Re: In North America, of the people who buy cell phones,  [#permalink]

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12 Oct 2018, 00:01
2
In North America, of the people who buy cell phones, the percentage of people who bought phones from local manufacturers has decreased by five percent in the past one year. Since many local phone manufacturers in North America depend heavily on the local population for their customer base, this reduction is likely to have caused a noticeable negative economic effect on these manufacturers.

Such questions which deal with PERCENTAGE are more than often weakened by showing overall increase in numbers and thus being faulty in reasoning by talking of percentage and number in the same breath

Which of the following, if true, most seriously weakens the argument?

(A)In the past year, the total number of people buying new cell phones has increased considerably in North America.
If total number has increased CONSIDERABLY, the increase can be easily taken more than 15-20%. let the number earlier be 1000 and now 1200
so if earlier there were 40% or 400 who bought phones from local manufacturer, now that is 35% of 1200 =420,so even though the % has decreased, teh actual number has increased

(B)Some people from Asia also buy cell phones from manufacturers in North America.
SOME makes this a very weak weakener. Had it been MOST, this choice too could have been a contender

(C)The cost price of cell phones has increased considerably, and so the selling price has also increased correspondingly.
Increase in both CP and SP may not effect the financial loss/profit

(D)Many new cell phone manufacturers have entered the market in North America.
out of scope

(E) Those who do not purchase from local manufacturers do not pay a high price for phones.
out of scope again

A
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Manager
Joined: 21 May 2017
Posts: 67
Location: India
Re: In North America, of the people who buy cell phones,  [#permalink]

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12 Oct 2018, 00:08
chetan2u wrote:
In North America, of the people who buy cell phones, the percentage of people who bought phones from local manufacturers has decreased by five percent in the past one year. Since many local phone manufacturers in North America depend heavily on the local population for their customer base, this reduction is likely to have caused a noticeable negative economic effect on these manufacturers.

Such questions which deal with PERCENTAGE are more than often weakened by showing overall increase in numbers and thus being faulty in reasoning by talking of percentage and number in the same breath

Which of the following, if true, most seriously weakens the argument?

(A)In the past year, the total number of people buying new cell phones has increased considerably in North America.
If total number has increased CONSIDERABLY, the increase can be easily taken more than 15-20%. let the number earlier be 1000 and now 1200
so if earlier there were 40% or 400 who bought phones from local manufacturer, now that is 35% of 1200 =420,so even though the % has decreased, teh actual number has increased

(B)Some people from Asia also buy cell phones from manufacturers in North America.
SOME makes this a very weak weakener. Had it been MOST, this choice too could have been a contender

(C)The cost price of cell phones has increased considerably, and so the selling price has also increased correspondingly.
Increase in both CP and SP may not effect the financial loss/profit

(D)Many new cell phone manufacturers have entered the market in North America.
out of scope

(E) Those who do not purchase from local manufacturers do not pay a high price for phones.
out of scope again

A

chetan2u : Thanksfor the explanation, I neglected "SOME" in choice B . Now understood where I was going wrong.
Manager
Joined: 31 May 2015
Posts: 104
Re: In North America, of the people who buy cell phones,  [#permalink]

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12 Oct 2018, 00:09
B is not providing numbers, we do not know how many people are buying from NA local manufacturers also the argument states the following "local phone manufacturers in North America depend heavily on the local population for their customer base".
In the other hand, answer A is claiming that the total number of people buying new cell phones has increased, which would imply that the amount of people who bought phones from local manufacturers had increased even thoug they represent a smaller percentage of the total population of NA phone buyers.
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Re: In North America, of the people who buy cell phones,   [#permalink] 12 Oct 2018, 00:09
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